我是初學者，網絡編程。我開始連接體重秤並在我的文本框中獲得刻度數字

Question

當我執行我的代碼時，它的權重變化時正常工作。但問題是我的文本框顯示01B等。請大家幫我得到了什麼錯在code.i希望它在人類可讀的格式INT像0546等等

if (InvokeRequired)  //<-- Makes sure the function is invoked to work properly in the UI-Thread 
    BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); }));  //<-- Function invokes itself 
else 
{ 
    while (_serialPort.BytesToRead > 0) //<-- repeats until the In-Buffer is empty 
    { 
     int dataLength = _serialPort.BytesToRead; 
     byte[] data = new byte[dataLength]; 
     int nbrDataRead = _serialPort.Read(data, 0, dataLength); 
     if (nbrDataRead == 0) 
      return; 
     string str = System.Text.Encoding.UTF8.GetString(data); 
     textBox1.Text = str.ToString(); 

    } 
} 

Answer 1

您需要在十六進制取重量轉換成十進制：

string str = GetValidNumber(System.Text.Encoding.UTF8.GetString(data)); 
int dec = int.Parse(str, System.Globalization.NumberStyles.HexNumber); 
textBox1.Text = dec.ToString() + "kg"; 

您需要檢查字符串中的有效ASCII字符，以便使用此方法：

public string GetValidNumber(String numberToValid) 
    { 
     string validNumber = ""; 
     bool isValidChar = false; 

     try 
     { 
      for (int i = 0; i < numberToValid.Length; i++) 
      { 
       isValidChar = CheckAsciiChar(numberToValid[i].ToString()); 

       if (isValidChar) 
        validNumber += numberToValid[i]; 
      } 
      return validNumber; 
     } 
     catch (Exception ex){}    
    } 

    private bool CheckAsciiChar(string c) 
    { 
     bool isValid = false; 
     try 
     { 
      byte[] asciiBytes = Encoding.ASCII.GetBytes(c); 

      for (int i = 48; i <= 57; i++) 
      { 
       if (asciiBytes[0] == i) 
        isValid = true; 
      } 

      for (int i = 65; i <= 90; i++) 
      { 
       if (asciiBytes[0] == i) 
        isValid = true; 
      } 

      for (int i = 97; i <= 122; i++) 
      { 
       if (asciiBytes[0] == i) 
        isValid = true; 
      } 

      if (asciiBytes[0] == 250) 
       isValid = true; 

      return isValid; 
     } 
     catch (Exception ex){}    
    }